Overview:

The Blueprint Engines 383 ci stroker crate engine combines classic muscle with modern performance, dyno-tested at 436 hp and 443 lb-ft of torque and features a genuine Holley Sniper 2 EFI system. Housed in a one-piece rear main seal BluePrint Engines High Strength Cast Iron 4-bolt main Block with a 4.000″ bore and 3.750″ stroke (383 ci), it features high-quality internals like a 544 Intake / .555 Exhaust Lift and 230 Intake / 236 Exhaust Duration @ .050 - 110° LSA hydraulic roller camshaft, hypereutectic pistons, 5.700″ rods, and Blueprint’s aluminum heads sporting 64cc chambers and raised ports. This engine is externally balanced front and rear for reliability and smooth operation.

The Sniper 2 EFI breathes through the satin dual-plane intake, offering crisp throttle response, self‑tuning via next generation ECU, and compatibility with modern fuels. It eliminates cold-start woes and rough idling, transforming the driving experience into one of modern efficiency on a vintage platform. Finished with a complete dress‑up kit—timing cover, valve covers, HEI distributor, and more, it’s a turnkey powerhouse that blends effortless drivability with classic muscle aesthetics.

Description:

• Horsepower and Torque: 436 Horsepower / 443 ft. lbs. Torque 
• Compression Ratio: 10.0:1
• BluePrint Engines Aluminum Heads
• BluePrint Engines Hydraulic Roller Cam
• BluePrint Engines Cast Crankshaft
• BluePrint Engines Hypereutectic Pistons

Block:

• BluePrint Engines High Strength Cast Iron Block
• Manufactured and Machined in the USA!
• Drilled and Tapped for Clutch Linkage
• Mech Fuel Pump Provision: Yes
• Passenger Side Dipstick
• 1-Piece Rear Main Seal
• 4-Bolt Main
• 4.000" Bore

Rotating Assembly:

• Cast Crankshaft
• 3.750" Stroke
• OEM Type 5.700" Connecting Rods w/ 150,000 PSI Bolts
• Hypereutectic Pistons
• Externally Balanced Front and Rear
  

Cylinder Heads:

• BluePrint Aluminum Cylinder Heads - H8002K
• 64cc Chamber
• 2.02" Intake / 1.60" Exhaust Valves
• 195cc Intake / 75cc Exhaust Runners

Cam Specs:

• Hydraulic Roller
• .544 Intake / .555 Exhaust Lift
• 230 Intake / 236 Exhaust Duration
• @ .050-110 Degree Lobe Separation

Ignition Timing:

• 34 Degrees Total at 3500 RPM

Also Includes:

• Standard Rotation Long Style Water Pump - BPP67265
• Holley Sniper 2 EFI System - BPP550-510-3XX
• Aluminum Intake Manifold - BPP350VINT
• Thermostat and Thermostat Housing
• HEI Distributor - BPP350RBK
  
• 14" BluePrint Air Cleaner
• Valve Covers - BPP9518
  
• Spark Plugs and Wires
• Harmonic Balancer
• Timing Cover
  
• Oil Pan

Notes:

• This engine features a true 4-inch bore, which mathematically yields 377 CID with a 3.75-inch stroke.
• Not for use in pollution-controlled vehicles.
  
• The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.
• *Intake Will not clear a stock Corvette hood. Please call for special build options.